Why is the equation incorrect?

$$ \text{Mg}_3 + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2 $$

A. Some of the subscripts are incorrectly used.
B. The equation is not balanced.
C. The valence of the nitride ion is incorrect.
D. The valence of the magnesium ion is incorrect.
E. The coefficient of $\text{N}_2$ is incorrect.

Question

Why is the equation incorrect?

$$ \text{Mg}_3 + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2 $$

A. Some of the subscripts are incorrectly used.
B. The equation is not balanced.
C. The valence of the nitride ion is incorrect.
D. The valence of the magnesium ion is incorrect.
E. The coefficient of $\text{N}_2$ is incorrect.

tadvisohil886 · Answer

The calence of nitride ion is incorrect. Nitride ion's valency is 3- (N3-)

Anonymous · Answer

The equation is incorrect because it is not balanced. The left side of the equation with Mg 3 ​ and N 2 ​ does not correspond to 3 magnesium and 2 nitrogen on the product side as written. Therefore, the correct answer is B: The equation is not balanced. 
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Answer (2)

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